During our half-year trip to 6 countries, our Water-to-go Active bottle was incredibly convenient. We did not use it to drink from exotic rivers or lakes, but everywhere we went, we could simply drink water from the tap. We never had to worry whether we had enough bottled water with us and never had to go to a store to buy plastic bottles. We drank from taps in Sri Lanka, Indonesia, Vietnam and Thailand and did not get sick once (other than from the tuna in a shady restaurant, which is probably on us…), so the filter really does what it should. The bottle will go with us on every trip from now on.